Hydrogenation of cyclohexene and benzene over an amorphous pd-zr alloy

Authors

  • Takeshige Takahashi,

    Corresponding author
    1. Department of Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima, 890, Japan
    • (Department of Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima, 890 Japan; Tel. 0992-54-7141, Ext. 4760
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  • Yoshinori Nishi,

    1. Department of Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima, 890, Japan
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  • Nobuyuki Otsuji,

    1. Department of Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima, 890, Japan
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  • Takami Kai,

    1. Department of Chemical Engineering, Faculty of Engineering, Kagoshima University, 1-21-40 Kohrimoto, Kagoshima, 890, Japan
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  • Takeshi Masumoto,

    1. Research Institute for Iron, Steel and Other Metals, Tohoku University, 1-3 Katahira, Sendai, 980, Japan
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  • Hisamichi Kimura

    1. Research Institute for Iron, Steel and Other Metals, Tohoku University, 1-3 Katahira, Sendai, 980, Japan
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Abstract

Amorphous Pd-Zr alloys, produced by a rapid solidification technique, were studied to determine their catalytic activity for the hydrogenation of cyclohexene and benzene. The activity of the amorphous alloy without pretreatment by air was lower than that of the corresponding crystalline alloy, but it was gradually increased with the pretreatment. The surface area and the hydrogen adsorption activity of the alloys were simultaneously increased with the pretreatment. It is found from X-ray diffraction pattern and SEM observation that palladium, which is an active species for hydrogenation in the amorphous alloys, is highly dispersed on the granulated ZrO2 surface by the pretreatment.

Abstract

On a étudié des alliages Pd-Zr amorphes, produits par une technique de solidification rapide, dans le but de déterminer leur activité catalytique pour l'hydrogénation du cyclohexéne et du benzène. L'activité de l'alliage amorphe sans prétraitement à l'air est inférieure à celle de l'alliage cristallin correspondant, mais augmente progressivement avec le prétraitement. La surface et l'activité de l'adsorption d'hydrogéne des alliages augmente simultanément avec le prétraitement. On a trouvé par l'observation au microscope à balayage (SEM) et par diffraction des rayons X, que le palladium, qui est une espèce active pour l'hydrogénation dans des alliages amorphes, est hautement dispersé à la surface du ZrO2 granulé, par le prétraitement.

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